On Jul 6, 2009, at 12:10 PM, Diez B. Roggisch wrote:
Philip Semanchuk wrote:
Hi all,
I can't figure out how to map a C variable of size_t via Python's
ctypes module. Let's say I have a C function like this:
void populate_big_array(double *the_array, size_t element_count)
{...}
How would I pass parameter 2? A long (or ulong) will (probably) work
(on most platforms), but I like my code to be more robust than that.
Furthermore, this is scientific code and it's entirely possible that
someone will want to pass a huge array with more elements than can be
described by a 32-bit long.
from ctypes import c_size_t
doesn't work for you? On my system, it's aliased to c_ulong, but I
guess
that's depending on the platfrom of course.
D'oh! [slaps forehead]
That will teach me to RTFM. In my 2.5 doc, it's not listed in the
"Fundamental data types" section in the tutorial, but it is mentioned
in "Fundamental data types" in the ctypes reference. You'd be
surprised at the amount of Googling I did without learning this on my
own.
Thanks
Philip
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